linux.git/include/linux/cred.h, branch v6.14-rc2

cred: fold get_new_cred_many() into get_cred_many()

2024-12-02T10:25:15+00:00

There's no need for this to be a separate helper.

Link: https://lore.kernel.org/r/20241126-zaunpfahl-wovon-c3979b990a63@brauner
Reviewed-by: Jens Axboe 
Signed-off-by: Christian Brauner

cred: remove unused get_new_cred()

2024-12-02T10:25:14+00:00

This helper is not used anymore so remove it.

Link: https://lore.kernel.org/r/20241125-work-cred-v2-29-68b9d38bb5b2@kernel.org
Reviewed-by: Jeff Layton 
Reviewed-by: Jens Axboe 
Signed-off-by: Christian Brauner

tree-wide: s/revert_creds_light()/revert_creds()/g

2024-12-02T10:25:09+00:00

Rename all calls to revert_creds_light() back to revert_creds().

Link: https://lore.kernel.org/r/20241125-work-cred-v2-6-68b9d38bb5b2@kernel.org
Reviewed-by: Jeff Layton 
Reviewed-by: Jens Axboe 
Signed-off-by: Christian Brauner

tree-wide: s/override_creds_light()/override_creds()/g

2024-12-02T10:25:09+00:00

Rename all calls to override_creds_light() back to overrid_creds().

Link: https://lore.kernel.org/r/20241125-work-cred-v2-5-68b9d38bb5b2@kernel.org
Reviewed-by: Jeff Layton 
Reviewed-by: Jens Axboe 
Signed-off-by: Christian Brauner

cred: remove old {override,revert}_creds() helpers

2024-12-02T10:25:09+00:00

They are now unused.

Link: https://lore.kernel.org/r/20241125-work-cred-v2-4-68b9d38bb5b2@kernel.org
Reviewed-by: Jeff Layton 
Reviewed-by: Jens Axboe 
Signed-off-by: Christian Brauner

cred: return old creds from revert_creds_light()

2024-12-02T10:25:08+00:00

So we can easily convert revert_creds() callers over to drop the
reference count explicitly.

Link: https://lore.kernel.org/r/20241125-work-cred-v2-2-68b9d38bb5b2@kernel.org
Reviewed-by: Jeff Layton 
Reviewed-by: Jens Axboe 
Signed-off-by: Christian Brauner

tree-wide: s/override_creds()/override_creds_light(get_new_cred())/g

2024-12-02T10:25:08+00:00

Convert all callers from override_creds() to
override_creds_light(get_new_cred()) in preparation of making
override_creds() not take a separate reference at all.

Link: https://lore.kernel.org/r/20241125-work-cred-v2-1-68b9d38bb5b2@kernel.org
Reviewed-by: Jeff Layton 
Reviewed-by: Jens Axboe 
Signed-off-by: Christian Brauner

cred: Add a light version of override/revert_creds()

2024-11-11T09:45:04+00:00

Add a light version of override/revert_creds(), this should only be
used when the credentials in question will outlive the critical
section and the critical section doesn't change the ->usage of the
credentials.

Suggested-by: Christian Brauner 
Signed-off-by: Vinicius Costa Gomes 
Signed-off-by: Amir Goldstein

cred: get rid of CONFIG_DEBUG_CREDENTIALS

2023-12-15T22:19:48+00:00

This code is rarely (never?) enabled by distros, and it hasn't caught
anything in decades. Let's kill off this legacy debug code.

Suggested-by: Linus Torvalds 
Signed-off-by: Jens Axboe 
Signed-off-by: Linus Torvalds

cred: switch to using atomic_long_t

2023-12-15T22:08:46+00:00

There are multiple ways to grab references to credentials, and the only
protection we have against overflowing it is the memory required to do
so.

With memory sizes only moving in one direction, let's bump the reference
count to 64-bit and move it outside the realm of feasibly overflowing.

Signed-off-by: Jens Axboe 
Signed-off-by: Linus Torvalds